Adjusting Optimization Settings

You’re not limited to using predefined settings to optimize your images. You can fine-tune these settings further by using the collection of pop-up menus, check boxes, and sliders available in the Settings portion of the dialog box. For example, if you want your JPEGs to retain a little more image quality as they’re compressed for the Web, you can change the default quality setting for a Medium JPEG image from 30 to 45, and, depending on the image, improve its sharpness and detail without increasing its download time. As you make adjustments, refer to the optimized image preview to the left of the Settings column. There, you can see how your changes affect the image, as well as its file size and download time.